package calendar;

import java.text.SimpleDateFormat;
import java.util.Date;

public class Calendar {
	 
	public static void main(String[] args) {
 
		String dateStart = "01/14/2012 09:29:58";
		String dateStop = "01/15/2012 10:31:48";
 
		//HH converts hour in 24 hours format (0-23), day calculation
		SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
 
		Date d1 = null;
		Date d2 = null;
 
		try {
			d1 = format.parse(dateStart);
			d2 = format.parse(dateStop);
 
			//in milliseconds
			long diff = d2.getTime() - d1.getTime();
 
			long diffSeconds = diff / 1000 % 60;
			long diffMinutes = diff / (60 * 1000) % 60;
			long diffHours = diff / (60 * 60 * 1000) % 24;
			long diffDays = diff / (24 * 60 * 60 * 1000);
 
			System.out.print(diffDays + " days, ");
			System.out.print(diffHours + " hours, ");
			System.out.print(diffMinutes + " minutes, ");
			System.out.println(diffSeconds + " seconds.");
 
		} catch (Exception e) {
			e.printStackTrace();
		}
 
		dateDifference(dateStart, dateStop);
		
		
	}
	
	public static void dateDifference(String dateStart, String dateStop){
		
		
		//HH converts hour in 24 hours format (0-23), day calculation
				SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
		 
				Date d1 = null;
				Date d2 = null;
		 
				try {
					d1 = format.parse(dateStart);
					d2 = format.parse(dateStop);
		 
					//in milliseconds
					long diff = d2.getTime() - d1.getTime();
					System.out.println(" i timestamp delle due date : "+d2.getTime()+", "+d1.getTime());
					long diffSeconds = diff / 1000 % 60;
					long diffMinutes = diff / (60 * 1000) % 60;
					long diffHours = diff / (60 * 60 * 1000) % 24;
					long diffDays = diff / (24 * 60 * 60 * 1000);
		            System.out.print("this is from method: ");
		
					System.out.print(diffDays + " days, ");
					System.out.print(diffHours + " hours, ");
					System.out.print(diffMinutes + " minutes, ");
					System.out.print(diffSeconds + " seconds.");
		 
				} catch (Exception e) {
					e.printStackTrace();
				}
		 
	}
	
 
}